Answer:
Lincoln successfully defended the principle of popular sovereignty.
Explanation:
They were also known as the Great Debates of 1858. They were seven debates held between the candidate for Senator of Illinois, Abraham Lincoln and the incumbent Senator, Stephen Douglas. The main issue discussed in the debates was slavery.
Douglass was the one who defended the principle of popular sovereignty, this was letting the people of a territory decide for themselves whether to allow slavery or not. Lincoln was against it because he said that popular sovereignty would perpetuate slavery.
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An underyling cause of World War I was that B - The web of alliances between the different European nations created for their defense - European nations or rather thier kings were already making strategic partnerships and alliances for a long time since that time to ensure their survival in the long run.
Answer:
Philadelphia had a more tolerant culture since it was founded by English Quakers, and Quakers were famous for preaching tolerance and promoting peaceful convivence among different groups of people.
Philadelphia was also at first the largest city of the U.S., and after, the second-largest, only lagging behind New York City. This meant more economic opportunities, including African Americans, who could find employment in the city's industrial sector.